c# - 填充 dataGridView 感谢 backGroundWorker

Question

我有这段代码:

private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
    {
        remplirDataGrid();
    }

private void frmChercherActesLoad(object sender, EventArgs e)
        {
            backgroundWorker1.RunWorkerAsync();

        }



 private void remplirDataGrid()
        {
            dataGridView1.DataSource = ActeServices.getAllActes(0, 40);
            dataGridView1.Columns[0].Visible = false;
            dataGridView1.Columns[1].HeaderText = "Code acte";
            dataGridView1.Columns[2].HeaderText = "Désignation";
            dataGridView1.Columns[3].HeaderText = "Pris en charge";
            dataGridView1.Columns[4].HeaderText = "Id article";
            dataGridView1.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);
        }

这里是方法getAllActe:

public static IEnumerable<Acte> getAllActes(int skipCount, int takeCount)
        {
            var myTableAdapter = new SmartDocDALServices.SmartDocDataSetTableAdapters.actesTableAdapter();
            myTableAdapter.Fill(myDataSet.actes);
            var myResult = from q in myDataSet.actes.AsEnumerable()
                            select new Acte
                            {
                                code = q.code,
                                designation = q.designation,
                                priseEnCharge = q.prise_en_charge,
                                idArticle = q.id_article,
                            };

            if (skipCount != -1)
                myResult.Skip(skipCount);
            if (takeCount != -1)
                myResult.Take(takeCount);
            IEnumerable<Acte> myResultRet = myResult.ToList();
            return myResultRet;

我喜欢做的是在我运行应用程序后使用后台工作程序填充我的 datagridview 我收到此错误:

Inter-thread operation not valid: Control 'dataGridView1 has been the subject of an access from a thread other than the one it was created.

---

我试试这个

 private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
    {
      IEnumerable<Acte> result = ActeServices.getAllActes(0, 40);
       backgroundWorker1.ReportProgress(0, result);

    }

    void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {

      dataGridView1.DataSource = (IEnumerable<Acte>)e.UserState;
      dataGridView1.Columns[0].Visible = false;
      dataGridView1.Columns[1].HeaderText = "Code acte";
     ***

但时间一无所获？我希望当 BGW 加载数据时数据网格更新 foreash 数据加载它将它添加到 DGV

Answer 1

您不能从 BackgroundWorker 线程更新 UI。

你需要向 UI 发送一个事件，然后有类似的东西:

private void EventHandler(object sender, YourEventArgs e)
{
    if (this.dataGridView1.InvokeRequired)
    {
        this.dataGridView1.Invoke((MethodInvoker)delegate { this.AddToGrid(e.YourData); });
    }
    else
    {
        this.AddToGrid(e.YourData);
    }
}